Search for diphoton events with large missing transverse momentum in 1 fb[superscript -1] of 7 TeV proton–proton collision data with the ATLAS detector
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Aad-2012-Search for diphoton.pdf
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1.15 MB
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Author(s)
Taylor, Frank E.
Date Issued
February 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Search for Diphoton Events with Large Missing Transverse Momentum in 1 fb[superscript -1] of 7 TeV Proton–proton Collision Data with the ATLAS Detector.” Physics Letters B 710, no. 4–5 (April 2012): 519–537. © 2012 CERN
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Final published version
Abstract
A search for diphoton events with large missing transverse momentum has been performed using 1.07 fb[superscript −1] of proton–proton collision data at √s = 7 TeV recorded with the ATLAS detector. No excess of events was observed above the Standard Model prediction and 95% Confidence Level (CL) upper limits are set on the production cross section for new physics. The limits depend on each model parameter space and vary as follows: σ<(22–129) fb in the context of a generalised model of gauge-mediated supersymmetry breaking (GGM) with a bino-like lightest neutralino, σ<(27–91) fb in the context of a minimal model of gauge-mediated supersymmetry breaking (SPS8), and σ<(15–27) fb in the context of a specific model with one universal extra dimension (UED). A 95% CL lower limit of 805 GeV, for bino masses above 50 GeV, is set on the GGM gluino mass. Lower limits of 145 TeV and 1.23 TeV are set on the SPS8 breaking scale Λ and on the UED compactification scale 1/R, respectively. These limits provide the most stringent tests of these models to date.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.02.054
